DUET 3 Fan Control

Hornetrider

Hi

I am now building up my 2nd printer with Duet, but this time with DUET3.
On Duet2WIFI I used the following to control the fan for board cooling.
M106 P2 T40:50 H100:101:102 ; Set Fan speed to cool MCU

With DUET3 I am a bit confused as the temp sensors have to be assigned.
Reading thru dokumentation I could not find a hint on how to control the MCU Temp with a FAN for DUET3...but maybe it was just to late in the night
Will the M106 like above still work?

Has somebody already made this with DUET3?

Can't wait to finish this project

Cheers

T3P3Tony

I have not setup a thermostatic fan using MCU temp on Duet 3 however this is how I believe it should work. First you need to setup the output pin you want to use as a fan:

M950 F2 C"out7"

Then setup a virtual temperature sensor for the MCU:

M308 S3 Y"mcutemp" A"mcutemp"

Then you stick them together using M106

M106 P2 T45 H3.

Danal

Working example for hot-end thermo fan:

M308 S0 P"0.temp0" Y"thermistor" T100000 B3950 A"Bed" 
M950 F10 C"1.out6"
M106 P10 S255 H1 T45    ; S = Speed of fan Px, Hxx = heater for thermo mode, T = temps for thermo mode.

As @T3P3Tony pointed out, only defining the input (M308) to be the proc instead of a pin, only that will be different.

Hornetrider

Thanks T3P3Tony and Danal

I will check it out.